SU571185A3 - Method of separating d-isomer of 2-(6-metoxy-2-naphthyl) propoinic acid and its mixture with i-isomers - Google Patents
Method of separating d-isomer of 2-(6-metoxy-2-naphthyl) propoinic acid and its mixture with i-isomersInfo
- Publication number
- SU571185A3 SU571185A3 SU7301905966A SU1905966A SU571185A3 SU 571185 A3 SU571185 A3 SU 571185A3 SU 7301905966 A SU7301905966 A SU 7301905966A SU 1905966 A SU1905966 A SU 1905966A SU 571185 A3 SU571185 A3 SU 571185A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- mixture
- isomer
- naphthyl
- methoxy
- propionic acid
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 16
- 239000002253 acid Substances 0.000 title claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 47
- 150000003839 salts Chemical class 0.000 claims description 20
- CMWTZPSULFXXJA-UHFFFAOYSA-N 2-(6-methoxy-2-naphthalenyl)propanoic acid Chemical compound C1=C(C(C)C(O)=O)C=CC2=CC(OC)=CC=C21 CMWTZPSULFXXJA-UHFFFAOYSA-N 0.000 claims description 16
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 15
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 7
- 238000002425 crystallisation Methods 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- ZGWVFTHCCKENBK-UHFFFAOYSA-N guanidine;zinc Chemical compound [Zn].NC(N)=N ZGWVFTHCCKENBK-UHFFFAOYSA-N 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- 235000019260 propionic acid Nutrition 0.000 claims description 6
- 150000007529 inorganic bases Chemical class 0.000 claims description 5
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 230000020477 pH reduction Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims 9
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical group CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims 4
- 239000000047 product Substances 0.000 claims 4
- 238000010992 reflux Methods 0.000 claims 4
- 239000000706 filtrate Substances 0.000 claims 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 2
- 239000000243 solution Substances 0.000 claims 2
- 238000003756 stirring Methods 0.000 claims 2
- BSQPJKMLKCWQOE-UHFFFAOYSA-N 2-(1-methoxynaphthalen-2-yl)propanoic acid Chemical compound C1=CC=C2C(OC)=C(C(C)C(O)=O)C=CC2=C1 BSQPJKMLKCWQOE-UHFFFAOYSA-N 0.000 claims 1
- 241000723347 Cinnamomum Species 0.000 claims 1
- 230000032683 aging Effects 0.000 claims 1
- 239000007864 aqueous solution Substances 0.000 claims 1
- 235000017803 cinnamon Nutrition 0.000 claims 1
- 238000004821 distillation Methods 0.000 claims 1
- 239000012065 filter cake Substances 0.000 claims 1
- 239000008235 industrial water Substances 0.000 claims 1
- 239000004615 ingredient Substances 0.000 claims 1
- 238000002955 isolation Methods 0.000 claims 1
- 150000007522 mineralic acids Chemical class 0.000 claims 1
- 239000012299 nitrogen atmosphere Substances 0.000 claims 1
- 150000007524 organic acids Chemical class 0.000 claims 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims 1
- 229910001950 potassium oxide Inorganic materials 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- 150000003751 zinc Chemical class 0.000 claims 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 239000002904 solvent Substances 0.000 description 5
- 238000001953 recrystallisation Methods 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 3
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 3
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- LAIUFBWHERIJIH-UHFFFAOYSA-N 3-Methylheptane Chemical compound CCCCC(C)CC LAIUFBWHERIJIH-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 2
- -1 glycol ethers Chemical class 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- XQMPFCWHEKIBNV-UHFFFAOYSA-N 2-(6-methoxynaphthalen-1-yl)propanoic acid Chemical compound OC(=O)C(C)C1=CC=CC2=CC(OC)=CC=C21 XQMPFCWHEKIBNV-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- BTGRAWJCKBQKAO-UHFFFAOYSA-N adiponitrile Chemical compound N#CCCCCC#N BTGRAWJCKBQKAO-UHFFFAOYSA-N 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- QESCHNIJDGQPJN-UHFFFAOYSA-N dimethylamino(oxo)methanesulfonic acid Chemical compound CN(C)C(=O)S(O)(=O)=O QESCHNIJDGQPJN-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 230000004572 zinc-binding Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/40—Unsaturated compounds
- C07C59/42—Unsaturated compounds containing hydroxy or O-metal groups
- C07C59/52—Unsaturated compounds containing hydroxy or O-metal groups a hydroxy or O-metal group being bound to a carbon atom of a six-membered aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B57/00—Separation of optically-active compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/40—Unsaturated compounds
- C07C59/58—Unsaturated compounds containing ether groups, groups, groups, or groups
- C07C59/64—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
(54) СПОСОБ ВЫДЕЛЕНИЯ d-ИЗОМЕРА 2- (6-МЕТОКСИ- 2-НАФТИЛ) ПРОПИОНОВОЙ КИСЛОТЫ ИЗ ЕГО СМЕСИ С Е-ИЗОМЕРОМ(54) METHOD FOR ISOLATING d-ISOMER 2- (6-METHOXY-2-NAFTHYL) PROPIONIC ACID FROM ITS MIXTURE WITH E-ISOMER
В качестве инертного органического растворител используют любой органический растворитель, в котором соль цинкгуанвдина и |-изомера 2 - (6 -метокси - 2 - дафТил) - пропионовой кислоты хорошо расгвор ютс . Примерами таких растворителей вл ютс : ацетон, ацетилацетон, адипонитрил, бензонитрил, бензиловый спирт, бензилмеркаптаи, бутиловый спирт, каприловый спирт, диацетоновый спирт, моио- и ди(низший) алкил, эфиры зтиленгликол и дизтиленгликоль, зтанол, метанол, н-пропанол , мзо-пропанол,этиленгликоль, 1,2-пропиленгликоль , 1,3-пропиленглшсоль, 2-этилгексанол,диметилсульфоксид , сульфо ы, диметилформамид, N-метилпирролидинон, формамид, фурфуриловый спирт, глицерин, изоамиловый спирт, изоамилсульфид , изобутилмеркаптан, дибутокситетразтиленгликоль , пиридин, триметиленгликоль, диоксан, диметилацетамид и т.д. Преимущественно используют пол рные , но не кислотные или сильно основные растворители.As an inert organic solvent, any organic solvent is used in which the salt of zincguan dine and the α-isomer of the 2- (6-methoxy-2-naphthyl) -propionic acid works well. Examples of such solvents are: acetone, acetylacetone, adiponitrile, benzonitrile, benzyl alcohol, benzylmercaptae, butyl alcohol, caprylic alcohol, diacetone alcohol, myo- and di (lower) alkyl, zethylene glycol ethers and distillyene glycol, zethanol, methanol, a la, yan, alkyl, aryl, and a (lower) alkyl; Mso-propanol, ethylene glycol, 2-ethyl hexane, dimethyl sulfoxide, sulfo, dimethylformamide, N-methyl pyrrolidinone, formamide, furfuryl alcohol eh, pyridine, trimethylene glycol, dioxane, dimethylacetamide, etc. Polar, but not acidic or strongly basic solvents are preferably used.
Таким образом, разделение путем кристаллизации достигаетс при.смешении d- и С-изомеров 2 (6 - метокси - 2 - нафтил) пропионовых кислот, инертного органического растворител , преимущественно метанола, в котором соль цинкгуашщина и 1-изомера 2 - (6 - метокси - 2 - нафтил) пропионовой кислоты более растворима, чем соль цинкгуающина и d-изомера 2 - (6 - метокси - 2 -нафтил ) - пропионовой кислоты, и неорганического основани , имеющего основность рКд больше 8; преимущественно гидроокиси кали , при этом растворимость в инертном органическом: растворителе солей d- и t-изомеров 2- (6 - метокси- 2 - нафтил)- пропионовой кислоты и названного неорганического основани больше, чем растворимость солей цинкгуанидина и d- и t-изомеров 2 - (6 - метокси - нафтил) - пропионовой кислоты. В этом случае образуетс суспензи , главным образом, соли цинкгуанидина и d-изомера 2 - (6 - метокси - 2 Нафтил ) - пропионовой кислоты в почти насьпценном растворе других компонентов. .Пэлее смесь охлаждают и кристаллизованные соли отдел ют. Продолжительное охлаждение влечет дальнейшую кристаллизацию растворенных солей. Желательно при охлаждении вводить в раствор дл зародышеобразовани небольшое количество соли цинкгуанидина и d-изомера 2 - (6 - метокси - 2 -нафтил ) - пропионовой кислоты, поскольку это обеспечивает хорошее разделение и высокий выход соли d-изомера.Thus, separation by crystallization is achieved by mixing the d- and C-isomers of 2 (6-methoxy-2-naphthyl) propionic acids, an inert organic solvent, mainly methanol, in which the salt is zinc-free and 1-isomer 2- (6-methoxy) - 2-naphthyl) propionic acid is more soluble than the salt of zinc-binding and d-isomer of 2- (6-methoxy-2-naphthyl) propionic acid, and an inorganic base having a basicity of pKd greater than 8; predominantly potassium hydroxide, while the solubility in the inert organic solvent of the salts of the d- and t-isomers of 2- (6-methoxy-2-naphthyl) -propionic acid and of the above-mentioned inorganic base is greater than the solubility of the salts of zinc guanidine and the d and t-isomers 2 - (6 - methoxy - naphthyl) - propionic acid. In this case, a suspension is formed, mainly the salts of zincguanidine and the d-isomer of 2 - (6 - methoxy - 2 Naphthyl) - propionic acid in an almost effective solution of other components. The mixture is cooled and the crystallized salts are separated. Prolonged cooling leads to further crystallization of the dissolved salts. It is desirable to introduce a small amount of zincguanidine salt and d-isomer of 2- (6-methoxy-2-naphthyl) -propionic acid into the solution for nucleation during cooling, since this ensures good separation and high yield of the d-isomer salt.
Наапьна и конечна температуры растворител подбираютс , главным образом, исход из практических соображешш, пока повышение температуры не повлечет существенного разложени других компонентов. Например, смесь может иметь начальную температуру от 50 до 100° С и может быть охлаждена до конечной температуры, ниже начальной , т.е. менее 40° С, преимущественно до 35° С. Разница температур существенна дл -обеспечени высокого выхода кристаллического продукта.At the nap and at the final temperature, the solvents are chosen mainly on the basis of practical considerations, until an increase in temperature entails a significant decomposition of the other components. For example, the mixture may have an initial temperature of from 50 to 100 ° C and may be cooled to a final temperature below the initial temperature, i.e. less than 40 ° C, preferably up to 35 ° C. The temperature difference is essential for providing a high yield of crystalline product.
Кристаллизующа с смесь поддерживаетс при Ьолее низких температурах до тех пор, пока кристаллизаци не закончитс (обычно более 15 мин и предпочтительно около 0,5 ч). Кристаллы отдел ютс The crystallization mixture is maintained at lower temperatures until crystallization is complete (usually more than 15 minutes and preferably about 0.5 hours). The crystals are separated.
от смеси, например, фильтрованием.from the mixture, for example, by filtration.
Качество разделени (процентное содержание d-изомера в целевом продукте) можно повысить путем перекристаллизации полученных кристаллических продуктов из тех же растворителей; что иThe quality of separation (the percentage of d-isomer in the target product) can be improved by recrystallization of the resulting crystalline products from the same solvents; what and
первоначальна кристаллизаци , или из других растворителей; процесс перекристаллизации проводитс обычно указанным способом.initial crystallisation, or from other solvents; The recrystallization process is usually carried out in this way.
Соединенные матричные растворы с каждой стадии кристаллизации могут быть вновь использованы . В зависимости от требуемой степени чистоты продукта можно провести процесс перекристаллизации один или несколько раз.The combined matrix solutions from each crystallization stage can be reused. Depending on the desired degree of purity of the product, it is possible to carry out the process of recrystallization one or several times.
Образовавша с соль обрабатьтаетс любой органической или минеральной кислотой, не разруциющей продукта, с образованием 2 - (6 - метокси-2 - нафтил) - пропионовой кислоты, обогащенной d-изомером.The salt formed is treated with any organic or mineral acid that does not degrade the product to form 2 - (6 - methoxy-2 - naphthyl) - propionic acid enriched in the d-isomer.
Обработка цинкгуанидиновой соли может быть осуществлена также с помощью сильного основани , например гидроокиси кали , или любого сильного основани , имеющего число рК больше 10, с последующим подкислением, например, сол ной кислотой , в результате чего образуетс d-изомер 2- (6-метокси - 2 - нафтил) - пропионовой кислоты. При проведении такой обработки, например, вThe treatment of the zinc guanidine salt can also be carried out using a strong base, for example potassium hydroxide, or any strong base having a pK number greater than 10, followed by acidification with, for example, hydrochloric acid, resulting in the formation of the d- isomer 2- (6-methoxy - 2 - naphthyl) - propionic acid. When carrying out such processing, for example, in
смеси .вода - метанол в соотнощении 3:1 при комнатной температуре продукт Легко отфильтровьшаетс .water mixtures - methanol in a ratio of 3: 1 at room temperature; the product is easily filtered.
Предлагаемый способ, предусматривающий использование i преимущественно гидроокиси кали , позвол ет существенно увеличить концентрацию dи Ё-изомеров 2 - (6 - метокси - 2 - нафтил) пропионовой кислоты, загружаемой в реакционную емкость, что позвол ет использовать большее количестно сырь в расчете на реакциошшш аппарат с ределенного размера, что в свою очередь означает снижение себестоимости получаемого продукта. Кроме того, при использовании кали требуетс только одна шламова смесь d- и t-изомеров 2 - (6- метокси - 2 - на тил) - пропионовой кислоты в метаноле дл получени соли цинкгуанидана, имеющей удовлетворительное значение величины угла штического вращени (свободна кислота), т.е солева смесь достаточно обогащена солью цинкгуанидина и d-изомера 2 - (6 - метокси - 2 нафтил ) - пропионовой кислоты; требуетс проведение только одной дополнительной перекристаллизации из метанола, чтобы получить фпзвычайно чистую соль, имеющую угол оптическою врагцени The proposed method, which involves using predominantly potassium hydroxide, makes it possible to significantly increase the concentration of d and E-isomers of 2- (6-methoxy-2-naphthyl) propionic acid loaded into the reaction tank, which allows using more raw materials per machine. from a certain size, which in turn means reducing the cost of the resulting product. In addition, when potassium is used, only one slurry mixture of d- and t-isomers of 2- (6-methoxy-2-per tyl) -propionic acid in methanol is required to obtain a salt of zinc guanidane, which has a satisfactory value of the angle of static rotation (free acid) , that is, the salt mixture is sufficiently enriched in the salt of zincguanidine and the d-isomer of 2 - (6 - methoxy - 2 naphthyl) - propionic acid; only one additional recrystallization from methanol is required to obtain a purely pure salt having an optical enemy angle
около 66° (свободна кислота).about 66 ° (free acid).
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US24646172A | 1972-04-21 | 1972-04-21 | |
| US35019373A | 1973-04-11 | 1973-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU571185A3 true SU571185A3 (en) | 1977-08-30 |
Family
ID=26937998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7301905966A SU571185A3 (en) | 1972-04-21 | 1973-04-20 | Method of separating d-isomer of 2-(6-metoxy-2-naphthyl) propoinic acid and its mixture with i-isomers |
Country Status (19)
| Country | Link |
|---|---|
| AR (1) | AR200998A1 (en) |
| AT (1) | AT325031B (en) |
| CA (1) | CA995676A (en) |
| CH (1) | CH574884A5 (en) |
| CS (1) | CS161980B2 (en) |
| DE (1) | DE2319245C3 (en) |
| DK (1) | DK139715B (en) |
| ES (1) | ES413924A2 (en) |
| FI (1) | FI57927C (en) |
| GB (1) | GB1422015A (en) |
| HU (1) | HU166932B (en) |
| IE (1) | IE37553B1 (en) |
| IL (1) | IL42078A (en) |
| IN (1) | IN138786B (en) |
| IT (1) | IT1044244B (en) |
| NL (1) | NL164549C (en) |
| SE (1) | SE406083B (en) |
| SU (1) | SU571185A3 (en) |
| YU (1) | YU36678B (en) |
-
1973
- 1973-04-13 IN IN878/CAL/73A patent/IN138786B/en unknown
- 1973-04-13 CA CA168,713A patent/CA995676A/en not_active Expired
- 1973-04-16 DE DE2319245A patent/DE2319245C3/en not_active Expired
- 1973-04-18 GB GB1881573A patent/GB1422015A/en not_active Expired
- 1973-04-18 NL NL7305486.A patent/NL164549C/en not_active IP Right Cessation
- 1973-04-18 FI FI1261/73A patent/FI57927C/en active
- 1973-04-18 AR AR247626A patent/AR200998A1/en active
- 1973-04-18 DK DK218673AA patent/DK139715B/en not_active IP Right Cessation
- 1973-04-19 YU YU1058/73A patent/YU36678B/en unknown
- 1973-04-19 SE SE7305624A patent/SE406083B/en unknown
- 1973-04-19 IE IE632/73A patent/IE37553B1/en unknown
- 1973-04-19 ES ES413924A patent/ES413924A2/en not_active Expired
- 1973-04-19 CH CH565073A patent/CH574884A5/xx not_active IP Right Cessation
- 1973-04-20 CS CS2907A patent/CS161980B2/cs unknown
- 1973-04-20 AT AT356773A patent/AT325031B/en not_active IP Right Cessation
- 1973-04-20 IT IT68148/73A patent/IT1044244B/en active
- 1973-04-20 IL IL42078A patent/IL42078A/en unknown
- 1973-04-20 SU SU7301905966A patent/SU571185A3/en active
- 1973-04-20 HU HUSI1314A patent/HU166932B/hu unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IN138786B (en) | 1976-03-27 |
| CA995676A (en) | 1976-08-24 |
| DE2319245B2 (en) | 1978-04-06 |
| HU166932B (en) | 1975-06-28 |
| IL42078A (en) | 1976-08-31 |
| NL7305486A (en) | 1973-10-23 |
| AR200998A1 (en) | 1975-02-06 |
| DK139715C (en) | 1979-09-17 |
| CH574884A5 (en) | 1976-04-30 |
| FI57927B (en) | 1980-07-31 |
| IE37553L (en) | 1973-10-21 |
| GB1422015A (en) | 1976-01-21 |
| DK139715B (en) | 1979-04-02 |
| SE406083B (en) | 1979-01-22 |
| NL164549C (en) | 1981-01-15 |
| IT1044244B (en) | 1980-03-20 |
| IE37553B1 (en) | 1977-08-17 |
| AT325031B (en) | 1975-09-25 |
| NL164549B (en) | 1980-08-15 |
| YU36678B (en) | 1984-08-31 |
| YU105873A (en) | 1982-06-18 |
| CS161980B2 (en) | 1975-06-10 |
| FI57927C (en) | 1980-11-10 |
| DE2319245A1 (en) | 1973-10-25 |
| DE2319245C3 (en) | 1978-12-07 |
| ES413924A2 (en) | 1976-11-16 |
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